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3 Product description
Functional principle
Power supply
Packaging
Transport
Transport inspection
8
The transducer of the ultrasonic sensor transmits short ultrasonic
pulses to the measured product. These pulses are reflected by
product surface and received again by the transducer as echoes. The
running time of the ultrasonic pulses from emission to reception is
proportional to the distance and hence the level. The determined level
is converted into an appropriate output signal and outputted as
measured value.
Two-wire electronics 4 ... 20 mA/HART for power supply and
measured value transmission over the same cable.
The supply voltage range can differ depending on the instrument
version.
The data for power supply are specified in chapter "Technical data".
The backlight of the indicating and adjustment module is powered by
the sensor. Prerequisite is a certain level of supply voltage.
The data for power supply are specified in chapter "Technical data".
3.3 Operation
LEVEL TRANSMITTER 8177 can be adjusted with different adjust-
ment media:
with indicating and adjustment module
l
With a HART handheld
l
The entered parameters are generally saved in LEVEL TRANS-
MITTER 8177, optionally also in the indicating/adjustment module.
3.4 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
according to DIN EN 24180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE foil
is also used. Dispose of the packaging material via specialised
recycling companies.
Transport must be carried out under consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or
concealed defects must be appropriately dealt with.
LEVEL TRANSMITTER 8177 • 4 ... 20 mA/HART
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